84 lines · cpp
1//===----------------------------------------------------------------------===//2//3// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.4// See https://llvm.org/LICENSE.txt for license information.5// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception6//7//===----------------------------------------------------------------------===//8 9// UNSUPPORTED: c++03, c++11, c++14, c++1710 11#include <algorithm>12#include <cstddef>13#include <deque>14#include <iterator>15#include <list>16#include <string>17#include <vector>18 19#include "benchmark/benchmark.h"20#include "../../GenerateInput.h"21#include "test_macros.h"22 23int main(int argc, char** argv) {24 auto std_fill = [](auto first, auto last, auto const& value) { return std::fill(first, last, value); };25 26 // {std,ranges}::fill(normal container)27 {28 auto bm = []<class Container>(std::string name, auto fill) {29 benchmark::RegisterBenchmark(30 name,31 [fill](auto& st) {32 std::size_t const size = st.range(0);33 using ValueType = typename Container::value_type;34 ValueType x = Generate<ValueType>::random();35 Container c(size, x);36 37 for ([[maybe_unused]] auto _ : st) {38 benchmark::DoNotOptimize(c);39 benchmark::DoNotOptimize(x);40 fill(c.begin(), c.end(), x);41 benchmark::DoNotOptimize(c);42 }43 })44 ->Arg(32)45 ->Arg(50) // non power-of-two46 ->Arg(1024)47 ->Arg(8192);48 };49 bm.operator()<std::vector<int>>("std::fill(vector<int>)", std_fill);50 bm.operator()<std::deque<int>>("std::fill(deque<int>)", std_fill);51 bm.operator()<std::list<int>>("std::fill(list<int>)", std_fill);52 bm.operator()<std::vector<int>>("rng::fill(vector<int>)", std::ranges::fill);53 bm.operator()<std::deque<int>>("rng::fill(deque<int>)", std::ranges::fill);54 bm.operator()<std::list<int>>("rng::fill(list<int>)", std::ranges::fill);55 }56 57 // {std,ranges}::fill(vector<bool>)58 {59 auto bm = [](std::string name, auto fill) {60 benchmark::RegisterBenchmark(name, [fill](auto& st) {61 std::size_t const size = st.range(0);62 bool x = true;63 std::vector<bool> c(size, x);64 65 for ([[maybe_unused]] auto _ : st) {66 benchmark::DoNotOptimize(c);67 benchmark::DoNotOptimize(x);68 fill(c.begin(), c.end(), x);69 benchmark::DoNotOptimize(c);70 }71 })->Range(64, 1 << 20);72 };73 bm("std::fill(vector<bool>)", std_fill);74#if TEST_STD_VER >= 23 // vector<bool>::iterator is not an output_iterator before C++2375 bm("rng::fill(vector<bool>)", std::ranges::fill);76#endif77 }78 79 benchmark::Initialize(&argc, argv);80 benchmark::RunSpecifiedBenchmarks();81 benchmark::Shutdown();82 return 0;83}84